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A Hybrid Discontinuous Voltage Controller for DSTATCOM Applications

Goyal, Sachin, Ghosh, Arindam, & Ledwich, Gerard F. (2008) A Hybrid Discontinuous Voltage Controller for DSTATCOM Applications. In IEEE Power Engineering Society General Meeting 2008, 20 -24 July, Pittsburgh USA.

Abstract

This paper proposes a hybrid discontinuous control methodology for a voltage source converter (VSC) based distribution static compensator (DSTATCOM) connected to a 3-phase distribution system. It is assumed that the DSTATCOM controls the point of common coupling (PCC) voltage. An LC output filter is connected at the output of the VSC. With the help of both filter inductor current and filter capacitor voltage control, the voltage across the filter capacitor is controlled. Based on the voltage error, the control is switched between voltage and current control mode. In this scheme, an extra diode state is used that makes the VSC output current discontinuous. This diode state reduces the switching losses because half of the total switching occurs at nearly zero converter current. The effects of different source conditions on voltage at PCC are studied. Voltage angle at PCC is controlled using a PI controller. Simulation studies are performed using PSCAD to validate the efficacy of the proposed controller.

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ID Code: 14224
Item Type: Conference Paper
Additional URLs:
Keywords: DSTATCOM, discontinuous current, hybrid control, LC output filter
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
Divisions: Current > Research Centres > ARC Centre of Excellence for Creative Industries and Innovation
Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2008 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 30 Jul 2008
Last Modified: 09 Jun 2010 23:01

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